{
  "abstract": "We present a multiwavelength analysis of the star ρ Oph C, covering X-ray, optical, near-infrared (NIR), and radio observations to test for the presence of interferometrically detected cool star companions. The X-ray observations from Chandra, XMM-Newton, and NuSTAR show flare-like events lasting minutes or days in time and have spectral properties consistent with those of cooler stars instead of the primary magnetic B star. The NIR data are also consistent with the proposed trinary system properties due to the presence of CO bandheads. After removing the primary B star’s rotation, the optical data from TESS show a residual signal at the level of 0.8 mmag, matching the variations expected from cool stars in orbit around a bright B star. Finally, multiepoch radio data reveal that ρ Oph C exhibits significant large-scale flux variations that are atypical for a magnetic massive star. Taken as a whole, the multiepoch and -wavelength data present a consistent picture of ρ Oph C as a rare trinary system composed of a hot star and two cool stars.",
  "abstract_shown": true,
  "affiliations": [
    "Massachusetts Institute of Technology",
    "Center for Astrophysics ∣ Harvard & Smithsonian",
    "Macalester College",
    "Laboratório Nacional de Astrofísica (LNA/MCTI)",
    "Space Telescope Science Institute",
    "California State University, Fresno",
    "University of Iowa",
    "East Tennessee State University",
    "Embry Riddle Aeronautical University"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 11,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Sean J. Gunderson",
      "orcid": "0000-0003-2602-6703"
    },
    {
      "affs": [
        1
      ],
      "name": "Walter W. Golay",
      "orcid": "0000-0001-7946-1034"
    },
    {
      "affs": [
        2
      ],
      "name": "Jackson Codd",
      "orcid": "0000-0002-3534-7691"
    },
    {
      "affs": [
        0
      ],
      "name": "David P. Huenemoerder",
      "orcid": "0000-0002-3860-6230"
    },
    {
      "affs": [
        3
      ],
      "name": "Felipe Navarete",
      "orcid": "0000-0002-0284-0578"
    },
    {
      "affs": [
        4,
        5
      ],
      "name": "Christiana Erba",
      "orcid": "0000-0003-1299-8878"
    },
    {
      "affs": [
        6
      ],
      "name": "Alexandrea Moreno",
      "orcid": "0009-0005-9304-0742"
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    {
      "affs": [
        2
      ],
      "name": "John M. Cannon",
      "orcid": "0000-0002-1821-7019"
    },
    {
      "affs": [
        7
      ],
      "name": "Richard Ignace",
      "orcid": "0000-0002-7204-5502"
    },
    {
      "affs": [
        8
      ],
      "name": "Pragati Pradhan",
      "orcid": "0000-0002-1131-3059"
    },
    {
      "name": "the MACRO consortium"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/23shbqmaavdfg.bib",
  "cited_by": 0,
  "doi": "10.3847/1538-4357/aeac15",
  "fulltext_url": null,
  "id": "23shbqmaavdfg",
  "issns": [
    "1538-4357",
    "0004-637X"
  ],
  "landing_url": "https://iopscience.iop.org/article/10.3847/1538-4357/aeac15",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "feed-journal",
      "astronomy/general"
    ],
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      "openalex",
      "3103|Stellar, planetary, and galactic studies"
    ]
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  "openalex": "W7224110409",
  "pdf_url": "https://iopscience.iop.org/article/10.3847/1538-4357/aeac15/pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-28",
  "publisher": "American Astronomical Society",
  "ris": "https://research.draconitic.com/paper/23shbqmaavdfg.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:17Z",
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      "field": "astronomy",
      "origin": "openalex:3103|Stellar, planetary, and galactic studies",
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  ],
  "title": "A Multiwavelength View of ρ Oph. II. Disentangling the Variability of the Multistar Component C",
  "title_text": "A Multiwavelength View of ρ Oph. II. Disentangling the Variability of the Multistar Component C",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:11Z",
  "url": "https://research.draconitic.com/paper/23shbqmaavdfg",
  "venue": "The Astrophysical Journal",
  "versions": []
}